Hermann kauwebtz



March 26, 1929. H.KAUWERTZ- 1,707,058

DEVICE FOR MIXING LIQUIDS INVARIABLE PROPORTIONS Fil ed Sept. 27, 1926 il lll lll Patented 'Mar. 26, 1929.

UNITED. STATES PATENT OFFICE.

DEVICE FOR MIXING LIQUIDS IN VARIABLE PROPORTIONS.

Application filed September 27, 1926, Serial No. 138,076, and in Germany September 28, 1925.

My invention refers to a device or the mixing oi liquids in any proportion of quantity desired. Hitherto it has been necessary to measure oil the required quantity of each component of mixture separately in turn, to fill the measured-oil quantities into a common recipient, and therein to mix the cornponent ingredients together to as homogeneous a mass as possible by means of mechaniczl stirring devices. This process necessitated a previous preparation, and therefore a storing or the mixtures until the time came for their being used, and while they were being stored it was in'ipossible to prevent unmixing taking place owing to the ingredients settling down according to their respective specific weight. lly means of the invention the mixtures are not prepared until just before they are drawn oil, and the mixing is done by utilizing the drawing-oi? movement, so that not only do all mechanical measuring and stirring devices become unnecessary, but at the moment of drawing oi'i and thus atthe moment of use there is produced an absolutely homogeneous mixture. The drawing oft" and the mixing are thus accomplished simultaneously. The invention consists in the fact, that the ra e of the flow of the component ingredionts through the adductor pipes is controlled and d termined by devices which vary the cros: I :1 ol the pipes according to the quantity proportions required, and that the how of the ingredients through these dcvil'cs takes place siinultaneiuisly, and that the inureeieuts, 1H9 sured oil in this way according to their rate o't how. are brought together into acoinuum pipe. .hlven ilthcse quantities of liquids, thus measured oil in proportion of their rate of flow, were merely then p; ed on alongside one another, the respective cross- 'scetion would ensure their being present in the required mixing proportion. As however the separate particles of a quantity of liquid never move in a straight line, there i set up already by the bringing together of the ingredients of the mixture an intimate commingling action, which may be intensified by means 0t devices for facilitating the mixing as for instance by means of spiral passage-mills, hai'lle plates, rotating mixingworius or pumps and the like. Exactness in the measuringol'l' oi. each ingredient otthe liquid mixture requires that the pressure which produces the flow-movement shall remain equal. In order to render the degree of pressure independent of the position ofthe surface of the liquid 1n the containing vessel, the containing vessel has according to my invention to be made in the form of a Mari otte jar, in which the pressure-equalizing dippipes can be made adjustable to vary the effective pressure. To obviate any suctioneil'ect arising behind the device which regulates the variation in section in the run-off pipe of the containing vessel such as might impair the degree of accuracy of the measuring-oii', my invention provides for the interior or said device communicating with the outside air. Further, in order to prevent the liquid, when the recipient is being filled, from entering the dip-pipe which equalizcs the pressure on the Mariette principle which entrance would at the beginning cause the flOW-Il'lOVGl llEIli) to be produced by a pressure higher for the weight of that quanti y of liquid, my invention provides at the lower end of the said dip-pipe a floating valve or the like that prevents the liquid from entering into said dip-pipe but allows air or gas to pass through said dip-pipe in the opposite direction. Moreover, the lower end of the dip-pipe is provided with devices for distributing the air or gases used to equalize the pressure. In order to enable the container built as a Mariottcs jar to be refilled at any time with liquid, there is athxed at the highest point of same a check valve and an overflow pipe closed by a siphon. According to my invention the supply pipe for fresh liquid is provided with arut-ot't device serving to alter gradually the passagesection, in like manner to the let-oil pipe, so that the quantity of fresh liquid can be adjusted to remain closely behind the quantity flowing-oil, with a view to an uninterrupted functioning of the drawlug-oil of the measured liquid. Thus, the liquid flowing in cannot in any way aii ect the height oi liquid producing the flowprcssure in the measuring-oft pipe. Furthermore the cut-oil" device of the supplypipe can be coupled to work so automatically in connection with the let-out pipe, that whenever any of the liquid mixture is drawn oii fresh liquid starts again to flow automatically into the recipients for the component ingredients.

In order to more fully explain my invention, I will now describe, by way of example, an embodiment of the same as illustrated in the accompanying drawingin which:

Fig. 1 is an elevation partly shown in section.

Fig. 2 shows in section the regulators for the cross-section oi the liquid-abducting pipes, and r Fig. 3 illustrates, by means of a detail view, a fine adjusti-nent for the cut-off (lie--- vice regulating the rate of flow.

in the apparatus illustrated it is assumed that it is a question of mixing two liquids, contained respectively in the vessels 1 and 2; These vessels are constructed as Mariette jars, and are as such completely closed and provided with a dip-pipe 8 con'nnunicating with the outer air or with a gas-reservoir. The dis harge oi the liquid takes place through the pipes d, which in this case project into the interior or" the containing vessels and terminate above the lower orifice oi the dippipe 52. The dip-pipe 3 introducedthrough. a packing-box 5 and a threaded cap nut (3, and can be adjusted in its efiective position in regard to the pipe 4. JThe introduction of fresh liquid takes place through the pipe 7. In order to enable fresh liquid to be introduccd at any moment, there is arranged at the highest point oreach liquid-containing vessel an automatic stop, valve 8 opening outwards, enabling the air to escape through pipe 7 when fresh liquid is introduced. A continually open overflow-pipe 9 is provided. with a liquid seal 10.

In order to prevent liquid from entering. the interior of dip-pipe 3 when liquid is be ing filled into the liquid con-tainer, there is arranged on the lower end of said pipe, the end being made/to widen out for the purpose, a floating valvell, which shuts oil entrance into the interior of the dip-pipe, without how ever hindering the passing of gas in the op posite direction. In order to effect as wide as possible a distribution of the quantity oi air or gas which in accordance with the Mariotte principle flows in when the pressure is bein equalized, there is arranged at the lowor orifice oi the dip-pipe a distrilniting-cone 12, on which the airor gas-bubbles oubble up. The distribution of these airor gasbubbles can be increased. by a catch-ring 13, the bottom of which is. provided with fine perforations 14L.

In the let oil pipes d are arranged adjustable cut-ofi devices 15, which .may be set to have any effective cross section desired. The cutting-oti'members are appropriately turned by means of a lever-handle as indicated in Fig, 1, and may turtl'ier for purposes of fine adjustment be fitted with a worm 10. which engages in a worm-wheel, 17 of the cuttingoitf member, as. in Fig. 3. The degree to which a change is effected in the cross-section within the cut-oil" device may be seen from the scale 18. This scale is appropriately st'andaixlized'in.agreement with the percentages of the mixtures that can be selected. In order to eliminate all possibility of suction e'it'ect taking. place in the discharge pipe 4- and the common pipe 20 liable to ailect the rate of flow of the component ingredients, the interior of each cut-oil device 15 communicatesby means of a pipe 19, with the outer air, as is shown in Fig. 2. In order to facilitate the mixing oi the liquids, measured-oil according to their rates oi flow by adjustment 01" taps 15, spiral p age-walls 21 can be arranged in the pipes i, and baffieplates 22 in the common pipe 20' (cf. Fig.

The simultaneous opening of the discharge of both component ingredients is effected, for example, by open-in a threebranch tap 23, indicated in Figs. 1 and 2' in the out-oil position.

The height of liquid which determines the liow 01h; pressure of the measured liquid is designated h. By changing the position of the lower end of the dip-pipe 3, this pressure can be varied to suit dii'lerent sorts of liquids or for otherpurpos s.

If it is desired to introd ce simultaneously res-h liquid. into containers 1 and 2, without interrupting the continuous withdrawal of the liquid mixture, the invention provides a cut-off device 15 fitted in the introducing pipe 7 out-each container vessel, said cut-ell device, however, not being opened so. wide as discharge-device belonging thereto, in order to allow of the quantity flowing in remaining just a little behind the quantity discharged, and thus to prevent the effective liquid 72 from being detrimentally affected bythe inflow. These two cut-oft devices can be positively coupled with each other by means of a connecting rod arrangement 24, so that also in the event of an intei iittent withdrawal ofliquid mixture there overflows in anew a quantity of fresh liquid maintained at a not quite equal level. By means of this arrangement in accordance with my invention the working can for instance be automatically set to one hundred times the contents of a container, before the surface of the liquid sinks to the point of the column of liquid 71, affecting the flow-pressure. It that point is indicated by a signal, the operation need only be interrupted once at that moment for the purpose of refilling completely the containers 1 and 2 concerned, in order to en sure once more an automatic working for the next 10000. or 50000 liters flowing through.

What I claim as my invention and desire to secure by Letters Patent of the United States is 1. A device for mixing liquids in predetermined proportions, comprising, in combination, a container for each component ingredient of the mixture to be produced, an abducting conduit on eachv container, a collecting conduit for all of said abducting conduits, in each abducting conduit a device for altering the cross section of said conduit in such. a manner that the flowing speeds of the ill) component ingredients may be adjusted in accordance to their proportions in the final mixture, means for starting the flow of all ingredients through their respective flow speed adjusting device simultaneously, each of said containers being closed and provided with a pressure restoring dip-pipe so as to act as a li tariotte jar, whereby the flow pressure in each abducting conduit is being maintained constant.

2. A device for mixing liquids in predetermined proportions, comprising in combination, a container for each component ingredient ot the n'nxturc to be produced, an ab ducting conduit on each contain vi. a collect ing conduit i in each abducting conduit a device for altering the cross section of said conduit in such a manner that the flowing speeds of the component ingredients may be adjusted in accord ance to their proportions in the final mixture, means for starting the flow oi all in gredients through their respective flow speed adjusting dev' es simultaneously, and means whereby the interiors of said How speed. adjusting devices communicate with the outer air.

3. A device for mixing liquids in predetermined proportions, comprising, in combination, a container for each component ingredient oi the mixture to be produced, an abducting conduit on each container, a collecting conduit for all of said abducting conduits, in each abducting conduit a device for altering the cross section of said conduit in such a manner that the flowing speeds of the com ponent ingredients may be adjusted in accordance to their proportions in the final mixture, means for starting the flow of all ingredients tlnrough their respective flow speed adjusting devices simultaneously, each oi said containers being closed and provided with a pressure restoring dip-pipe so as to act as a lvl ariotte ar, whereby the flow pressure in each abducting conduit is being maintained constant, andv a communication passage between the interior of each flow speed adjusting device and the outer air, whereby the production of a suction effectwithin said abductin g conduits is prevented.

a. A device for mixing liquids in predetern'iined proportions, comprising, in combination, a closed container for each component ingredient of the mixture to be produced, in each container a pressure equalizing tube extending from the outer air into the liquid ingredient, said pressure equalizing tube being vertically adjustable, an abducting conduit on each co-ntainer,'a collecting conduit for all of said abducting conduits, in each abducting conduit a device for altering the cross section of said conduit in such a manner that the flowing speeds of the component ingredients may be adjusted in accord ance to their proportions in the final mix- ,r all of said abducting conduit ,7

ture, and means for starting the flow of all ingredients through their respective flow speed adjusting devices simultaneously.

5. A device tor mixing liquids in predetermined proportions, comprising, in combination, a closed container for each component ingredient oi? the mixture to be produced, in each container a pressure equalizing tube extending from the outer air into the liquid ingredient, said. pressure equalizing tube being vertically adjustable, at the lower end of each tube means adapted;to'prevcnt liquid from entering said tube but allowing air to pass through it in opposite direction, an abducting conduit on each container, a collecting conduit for all of said abducting conduits, in each abducting conduit a device for tltering the cross section of said conduit in such a i'nannerthat the flowing speeds of the component ingredients may be adjusted inaccordance to their proportions in the final mixture, and means for starting the flow of all ingredients through their respective flow speed adjusting devices si nultaneously.

6. A device for mixing liquids in predetermined proportions, comprising, in combination, closed container for each component ingredient of the mixture to be produced, in each. container a pressure equalizing tube extending i'rcm theouter air into the liquid ingredient, said. pressure equalizing tube being vertically adjustable, an abducting conduit on each container, a collecting conduit for all of Sold abducting conduits, in each abducting conduit a device for altering the cross section of said conduit in such a manner that the flowing speeds of the component ingredients may be adjusted in accordance to their proportions in the final mixture, means for starting the flow oil: all ingredients through their respective flow speed adjusting devices simultaneously, the top of each container a self-closing valve opening towards the outer air, and an overflow tube with a liquid seal.

7. A. device n u'iixing liquids in predetermined proportions, com irising, in combination, a cl ised container for each component ii'igredient or the mixture to be produced, in each container a pressure equalizing tube eX- tending from the outer air into the liquid ingredient, said pressure equalizing tube being vertically adjust-able, at the lower end of each tube means adapted to prevent liquid from entering said tube but allowing air to pass through it in opposite direction, at the top o't each container a selliclosing valve opening towards the outer air, and on each container an overflow tube with a liquid S. device for mixing liquids in predetermined proportions, comprising, in combination, closed container for each component ingredientof the mixture to be produced, in each container a pressure equalizing tube extending from the outer air into the liquid init, said pressure equalizing tube being ly ustahlo, at the lower end 01 said Wid ly distributing air adhrough said. tube, an abducting cow eac container, a collecting conduit ll of t abductin conduits, in each iii; a device ior aiie tg the '7 seid conduit 1n such ii of the component in in the 1 izow ial mini-ure and of all ingredients 1 through their rcspe CiGVlCGS snnultane comprising, in combinav he flowing speeds of the component ingrec iehts may be adjusted in *ordance to their nopcrtions in the final. mixture starting the flow oi all ne'reuients their respective flow speed adjusting device simultaneously, in connection 'W' container a supply D116 i'or i'resh at d l within said supply pipe means whereby quant'ty supplied can-i e dosed. so as to be less than the q antity crawn off through said abducting conduit.

10. A device for inixin iquids in 1 D A I I l ternnned' proportions, coinprlsln 1n cor.

"oinnonen na ion, a closed con ainer for eacii c A ingredient of the inii ture to be pr ,cuceC' in each container a pressure equalizing tune e;;- tending from the outer air into the liquid iii-- gred'ent, said pressure equalizing; tube being vex-ti rally adjustable, an abducting conduit 01. each container, a mllccting conduit {0 ali of said abductlng conduits, in eachv abducting J ure to he produced, in.

mos ass n Sueconduit a device for altering the cross tionof said conduit in such a manner tha' the flowing speeds of the component ingredients may ve adjusted in ac ance to tiieir n'oportirrs in the final 1 i. i i'neanssiritln toe flow of all i ilou' i (i r a Wii and and

ed A.- o

it Cl terniii in com YOUUC oer, a ductin J Aha a ducting eondu" c i section of said ii the flowing rd in accordai l s a I V i with each coniainer a supp liqi Xi, "thin said sup the quantity supplied c ss the the qr Ly f, iiwn oi? through said abductv conduit, a pos connection between PJVB lastninied means and said flow speedadjusting device neans in: connection with t ie interior )f each flow speed adjusting); device whereby the production of a suction effect within said abducting condi is prevented, and, means for assistiu the mixing of I we measured ingroi'licni-su llERliM-Lh N HAUl VE l 

